EXmlHash: Evolution-Data-Server Reference Manual

## EXmlHash EXmlHash |

## Functions

GHashTable * | e_xml_to_hash ()
xmlDoc * | e_xml_from_hash ()
void | e_xml_destroy_hash ()
void | (*EXmlHashFunc) ()
gboolean | (*EXmlHashRemoveFunc) ()
EXmlHash * | e_xmlhash_new ()
void | e_xmlhash_add ()
void | e_xmlhash_remove ()
EXmlHashStatus | e_xmlhash_compare ()
void | e_xmlhash_foreach_key ()
void | e_xmlhash_foreach_key_remove ()
void | e_xmlhash_write ()
void | e_xmlhash_destroy ()

## Types and Values

enum | EXmlHashType
enum | EXmlHashStatus
typedef | EXmlHash

## Description

## Functions

### e_xml_to_hash ()

    GHashTable *
    e_xml_to_hash (xmlDoc *doc,
                   EXmlHashType type);

Creates a GHashTable representation of the xmlDoc `doc` . If `type` is * `E_XML_HASH_TYPE_PROPERTY` , all XML nodes will be indexed in the GHashTable by name. If `type` is `E_XML_HASH_TYPE_OBJECT_UID`, then XML objects will be indexed in the hash by their UID (other nodes will still be indexed by name).

#### Parameters

doc | The xmlDoc to store in a hash table. |
type | The value type to use as a key in the hash table. |

#### Returns

The newly-created GHashTable representation of `doc` .

[transfer full][element-type utf8 utf8]

### e_xml_from_hash ()

    xmlDoc *
    e_xml_from_hash (GHashTable *hash,
                     EXmlHashType type,
                     const gchar *root_name);

Uses the key/value pair representation of an XML structure in `hash` to build an equivalent xmlDoc. This is the reverse of `e_xml_to_hash()`.

#### Parameters

hash | The GHashTable to extract the XML from. | [element-type utf8 utf8]
type | The EXmlHashType used to store the XML |
root_name | The name to call the new xmlDoc |

#### Returns

the xmlDoc created from the data in `hash`

### e_xml_destroy_hash ()

    void
    e_xml_destroy_hash (GHashTable *hash);

Frees the memory used by `hash` and its contents.

#### Parameters

hash | the GHashTable to destroy. | [element-type utf8 utf8]

### EXmlHashFunc ()

    void
    (*EXmlHashFunc) (const gchar *key,
                     const gchar *value,
                     gpointer user_data);

### EXmlHashRemoveFunc ()

    gboolean
    (*EXmlHashRemoveFunc) (const gchar *key,
                           const gchar *value,
                           gpointer user_data);

### e_xmlhash_new ()

    EXmlHash *
    e_xmlhash_new (const gchar *filename);

Creates a new EXmlHash from the file `filename` . If `filename` does not already exist, an empty EXmlHash will be created.

#### Parameters

filename | the name of an XML file |

#### Returns

The new EXmlHash structure, or `NULL` if unable to parse `filename` .

### e_xmlhash_add ()

    void
    e_xmlhash_add (EXmlHash *hash,
                   const gchar *key,
                   const gchar *data);

Adds a new key/value pair to the EXmlHash `hash` .

#### Parameters

hash | the EXmlHash to add an entry to |
key | the key to use for the entry |
data | the value of the new entry |

### e_xmlhash_remove ()

    void
    e_xmlhash_remove (EXmlHash *hash,
                      const gchar *key);

Remove the entry in `hash` with key equal to `key` , if it exists.

#### Parameters

hash | the EXmlHash to remove an entry from |
key | the key of the entry to remove |

### e_xmlhash_compare ()

    EXmlHashStatus
    e_xmlhash_compare (EXmlHash *hash,
                       const gchar *key,
                       const gchar *compare_data);

Compares the value with key equal to `key` in `hash` against `compare_data` .

#### Parameters

hash | the EXmlHash to compare against |
key | the key of the hash entry to compare with |
compare_data | the data to compare against the hash entry |

#### Returns

E_XMLHASH_STATUS_SAME if the value and `compare_data` are equal,E_XMLHASH_STATUS_DIFFERENT if they are different, or E_XMLHASH_STATUS_NOT_FOUND if there is no entry in `hash` with its key equal to `key` .

### e_xmlhash_foreach_key ()

    void
    e_xmlhash_foreach_key (EXmlHash *hash,
                           EXmlHashFunc func,
                           gpointer user_data);

Executes `func` against each key/value pair in `hash` .

#### Parameters

hash | an EXmlHash |
func | the EXmlHashFunc to execute on the data in `hash` . | [scope async]
user_data | the data to pass to `func` |

### e_xmlhash_foreach_key_remove ()

    void
    e_xmlhash_foreach_key_remove (EXmlHash *hash,
                                  EXmlHashRemoveFunc func,
                                  gpointer user_data);

Calls `g_hash_table_foreach_remove()` on `hash` 's internal hash table. See `g_hash_table_foreach_remove()` for details.

#### Parameters

hash | an EXmlHash |
func | the EXmlHashFunc to execute on the data in `hash` . | [scope async]
user_data | the data to pass to `func` |

### e_xmlhash_write ()

    void
    e_xmlhash_write (EXmlHash *hash);

Writes the XML represented by `hash` to the file originally passed to `e_xmlhash_new()`.

#### Parameters

hash | The EXmlHash to write. |

### e_xmlhash_destroy ()

    void
    e_xmlhash_destroy (EXmlHash *hash);

Frees the memory associated with `hash` .

#### Parameters

hash | The EXmlHash to destroy. |

## Types and Values

### enum EXmlHashType

#### Members

E_XML_HASH_TYPE_OBJECT_UID | Use the object UID as the hash key. |
E_XML_HASH_TYPE_PROPERTY | Use the property name as the hash key. |

### enum EXmlHashStatus

#### Members

E_XMLHASH_STATUS_SAME | The compared values are the same. |
E_XMLHASH_STATUS_DIFFERENT | The compared values are different. |
E_XMLHASH_STATUS_NOT_FOUND | The key to compare against was not found. |

### EXmlHash

    typedef struct EXmlHash EXmlHash;

A hash table representation of an XML file.